/*
 * Copyright 2013-2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.config.client;

import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.config.helper.HelperZuulRoutesProperties;
import org.springframework.cloud.context.refresh.ContextRefresher;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;

/**
 * Expose a ConfigClientProperties just so that there is a way to inspect the properties
 * bound to it. It won't be available in time for autowiring into the bootstrap context,
 * but the values in this properties object will be the same as the ones used to bind to
 * the config server, if there is one.
 *
 * @author Dave Syer
 * @author Marcos Barbero
 */
@Configuration
@EnableConfigurationProperties(HelperZuulRoutesProperties.class)
public class ConfigClientAutoConfiguration {


    @Bean
    public ConfigClientProperties configClientProperties(Environment environment,
                                                         ApplicationContext context) {
        if (context.getParent() != null
                && BeanFactoryUtils.beanNamesForTypeIncludingAncestors(
                context.getParent(), ConfigClientProperties.class).length > 0) {
            return BeanFactoryUtils.beanOfTypeIncludingAncestors(context.getParent(),
                    ConfigClientProperties.class);
        }
        return new ConfigClientProperties(environment);
    }

    @Bean
    public ConfigClientHealthProperties configClientHealthProperties() {
        return new ConfigClientHealthProperties();
    }

    @Configuration
    @ConditionalOnClass(HealthIndicator.class)
    @ConditionalOnBean(ConfigServicePropertySourceLocator.class)
    @ConditionalOnProperty(value = "health.config.enabled", matchIfMissing = true)
    protected static class ConfigServerHealthIndicatorConfiguration {

        @Bean
        public ConfigServerHealthIndicator configServerHealthIndicator(
                ConfigServicePropertySourceLocator locator,
                ConfigClientHealthProperties properties, Environment environment) {
            return new ConfigServerHealthIndicator(locator, environment, properties);
        }
    }

    @Configuration
    @ConditionalOnClass(ContextRefresher.class)
    @ConditionalOnBean(ContextRefresher.class)
    @ConditionalOnProperty(value = "spring.cloud.config.watch.enabled")
    protected static class ConfigClientWatchConfiguration {

        @Bean
        public ConfigClientWatch configClientWatch(ContextRefresher contextRefresher) {
            return new ConfigClientWatch(contextRefresher);
        }
    }

}
